Упростите выражение
(a-b)(a+b)-(a-b)^2/ab-b^2
a/a-b - b/a+b

a²-b²-(a²-2ab+b²)/ab-b²-b/aa²-b²-a²-2ab-b²/ab-b²-b/a-2b²+2ab/ab-b²-b/ab(-2b+2a)/ab-b²-b/a-2b+2a/a-b²-b/a-2b+2a-ab²-b/a-3b+2a-ab²/a